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Flutter官網(wǎng)?https://flutter.dev/
Flutter中文網(wǎng)? https://flutterchina.club/
一、windows環(huán)境搭建
配置鏡像（加快FlutterSDK下載）? ? ? ?
????? ?官方寫的這個(gè)export是用在linux上的
export?PUB_HOSTED_URL=https://pub.flutter-io.cn export?FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn
????? ?window上要將export換成set，但是去環(huán)境變量界面查看竟然沒有
????????
????????cmd 輸入set，會(huì)查看所有的環(huán)境變量，發(fā)現(xiàn)有設(shè)置的環(huán)境變量。
下載FlutterSDK
下載FlutterSDK,在path里配置“flutter\bin”的環(huán)境變量。
執(zhí)行flutter doctor，下載FlutterSDK相關(guān)的依賴。
? ? ??
二、創(chuàng)建Flutter項(xiàng)目
創(chuàng)建項(xiàng)目
??????
????????這里的flutter sdk path就是flutter文件夾位置
????????
???????*****和創(chuàng)建Android APP項(xiàng)目對(duì)比可發(fā)現(xiàn)，沒有了minSdk、targetSdk這些個(gè)選項(xiàng)。（意思）
????????
運(yùn)行項(xiàng)目
????? 首次運(yùn)行，可能會(huì)有以下錯(cuò)誤：
Launching?lib\main.dart?on?SM?N9009?in?debug?mode... Initializing?gradle... Finished?with?error:?ProcessException:?Process?"F:\Work\Flutter\flutter_app\android\gradlew.bat"?exited?abnormally: Downloading?https://services.gradle.org/distributions/gradle-4.10.2-all.zip .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Exception?in?thread?"main"?javax.net.ssl.SSLException:?Connection?has?been?shutdown:?javax.net.ssl.SSLException:?java.net.SocketException:?Connection?reset at?sun.security.ssl.SSLSocketImpl.checkEOF(SSLSocketImpl.java:1551) at?sun.security.ssl.AppInputStream.available(AppInputStream.java:60) at?java.io.BufferedInputStream.available(BufferedInputStream.java:410) at?sun.net.www.MeteredStream.available(MeteredStream.java:170) at?sun.net.www.http.KeepAliveStream.close(KeepAliveStream.java:85) at?java.io.FilterInputStream.close(FilterInputStream.java:181) at?sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.close(HttpURLConnection.java:3448) at?org.gradle.wrapper.Download.downloadInternal(Download.java:77) at?org.gradle.wrapper.Download.download(Download.java:44) at?org.gradle.wrapper.Install$1.call(Install.java:61) at?org.gradle.wrapper.Install$1.call(Install.java:48) at?org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65) at?org.gradle.wrapper.Install.createDist(Install.java:48) at?org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128) at?org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61) Caused?by:?javax.net.ssl.SSLException:?java.net.SocketException:?Connection?reset at?sun.security.ssl.Alerts.getSSLException(Alerts.java:208) at?sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1959) at?sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1916) at?sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1880) at?sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1825) at?sun.security.ssl.AppInputStream.read(AppInputStream.java:116) at?java.io.BufferedInputStream.read1(BufferedInputStream.java:284) at?java.io.BufferedInputStream.read(BufferedInputStream.java:345) at?sun.net.www.MeteredStream.read(MeteredStream.java:134) at?java.io.FilterInputStream.read(FilterInputStream.java:133) at?sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:3375) at?sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:3368) at?org.gradle.wrapper.Download.downloadInternal(Download.java:62) ...?7?more Caused?by:?java.net.SocketException:?Connection?reset at?java.net.SocketInputStream.read(SocketInputStream.java:210) at?java.net.SocketInputStream.read(SocketInputStream.java:141) at?sun.security.ssl.InputRecord.readFully(InputRecord.java:465) at?sun.security.ssl.InputRecord.readV3Record(InputRecord.java:593) at?sun.security.ssl.InputRecord.read(InputRecord.java:532) at?sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983) at?sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:940) at?sun.security.ssl.AppInputStream.read(AppInputStream.java:105) ...?14?more ??Command:?F:\Work\Flutter\flutter_app\android\gradlew.bat?-v
? ? 這個(gè)是在下載gradle，網(wǎng)絡(luò)不好的原因。如果網(wǎng)絡(luò)好了，run會(huì)自動(dòng)下載gradle，run成功之后，控制臺(tái)會(huì)顯示：
重慶分公司
重慶分公司
????Launching?lib\main.dart?on?SM?N9009?in?debug?mode...
Initializing?gradle...
Resolving?dependencies...
[{"event":"app.progress","params":{"appId":"d62136c6-30c8-4426-8e6e-e1ec5bdf918e","id":"2","progressId":null,"message":"Running?Gradle?task?'assembleDebug'..."}}]Running?Gradle?task?'assembleDebug'...
Built?build\app\outputs\apk\debug\app-debug.apk.
Installing?build\app\outputs\apk\app.apk...
[{"event":"app.progress","params":{"appId":"d62136c6-30c8-4426-8e6e-e1ec5bdf918e","id":"4","progressId":null,"message":"Syncing?files?to?device?SM?N9009..."}}]Syncing?files?to?device?SM?N9009...?? ? 趕緊體驗(yàn)了一把“熱重載”特性，實(shí)在是非常爽?。?！
? ? ?另外，通過控制臺(tái)日志可以發(fā)現(xiàn)：
Launching?lib\main.dart?on?SM?N9009?in?debug?mode... Initializing?gradle... Resolving?dependencies... Running?Gradle?task?'assembleDebug'... Built?build\app\outputs\apk\debug\app-debug.apk. Installing?build\app\outputs\apk\app.apk... Syncing?files?to?device?SM?N9009...
????? 項(xiàng)目第一次run的時(shí)候，也會(huì)生成apk文件。
?打開項(xiàng)目出現(xiàn)一直提示加載的問題? ??
? ? ? ?Android Studio使用flutter upgrade等時(shí)提示waiting for another flutter command to release the startup lock
????? 解決辦法：
????先打開任務(wù)管理器，結(jié)束掉所有dart.exe。然后打開你的flutter安裝文件夾，找到\bin\cache中的lockfile文件刪除。之后重啟Android?Studio。
????????????????????
依賴package
????? ?****更新yaml文件之后，點(diǎn)擊Packages get，即可將包下載下來。
????? ?
????????然后在dart里import
????????
???????****?yaml文件，點(diǎn)擊Get dependencies，會(huì)報(bào)下面的錯(cuò)誤，不用管就行。
Working?dir:?F:\Work\Flutter\startup_namer G:\Android\flutter_windows_v1.7.8+hotfix.4-stable\flutter\bin\cache\dart-sdk\bin\pub.bat?upgrade Resolving?dependencies... Because?startup_namer?depends?on?flutter_test?any?from?sdk?which?doesn't?exist?(the?Flutter?SDK?is?not?available),?version?solving?failed. Flutter?users?should?run?`flutter?pub?get`?instead?of?`pub?get`. Process?finished?with?exit?code?69
????? ? ? ??
? ? ?????
